diff --git a/.github/workflows/release.yml b/.github/workflows/release.yml
index 6896bda6..bbfbc47c 100644
--- a/.github/workflows/release.yml
+++ b/.github/workflows/release.yml
@@ -17,7 +17,10 @@ concurrency: ${{ github.workflow }}-${{ github.ref }}
 jobs:
   release:
     name: Release
-    runs-on: blacksmith-4vcpu-ubuntu-2404
+    # GitHub-hosted (not Blacksmith): npm provenance attestations, which are
+    # generated automatically by OIDC trusted publishing, are only accepted
+    # from github-hosted runners — self-hosted runners are rejected with E422.
+    runs-on: ubuntu-latest
     steps:
       - name: Checkout Repo
         uses: actions/checkout@v6